Hi, I added a code via the Tag Manager, but it doesn't seem to be working. Can you check if the tag manager is set up properly? (I waited about 2-3 hours after adding the code, to ensure the "caching" issue wasn't causing the delay.)
1. Check to see if the rule for the code in Google Tag Manager is set as: All pages.
2. If not, you will need to add the rule. Click on the Name of the Tag.
3. Click +Add.
4. Check the box before All pages and select Save.
This should resolve the problem.